diff options
| -rw-r--r-- | net/mac80211/ibss.c | 49 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 1 |
2 files changed, 45 insertions, 5 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 21a0b88..275bbb2 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -229,6 +229,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, struct beacon_data *presp; enum nl80211_bss_scan_width scan_width; bool have_higher_than_11mbit; + bool radar_required = false; int err; sdata_assert_lock(sdata); @@ -273,6 +274,23 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, } chandef.width = NL80211_CHAN_WIDTH_20; chandef.center_freq1 = chan->center_freq; + /* check again for downgraded chandef */ + if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { + sdata_info(sdata, + "Failed to join IBSS, beacons forbidden\n"); + return; + } + } + + err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, + &chandef); + if (err > 0) { + if (!ifibss->userspace_handles_dfs) { + sdata_info(sdata, + "Failed to join IBSS, DFS channel without control program\n"); + return; + } + radar_required = true; } ieee80211_vif_release_channel(sdata); @@ -297,6 +315,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, rcu_assign_pointer(ifibss->presp, presp); mgmt = (void *)presp->head; + sdata->radar_required = radar_required; sdata->vif.bss_conf.enable_beacon = true; sdata->vif.bss_conf.beacon_int = beacon_int; sdata->vif.bss_conf.basic_rates = basic_rates; @@ -796,6 +815,21 @@ static void ieee80211_csa_connection_drop_work(struct work_struct *work) ieee80211_queue_work(&sdata->local->hw, &sdata->work); } +static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + int err; + + /* if the current channel is a DFS channel, mark the channel as + * unavailable. + */ + err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, + &ifibss->chandef); + if (err > 0) + cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, + GFP_ATOMIC); +} + static bool ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems, @@ -880,8 +914,7 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, goto disconnect; } - if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, - IEEE80211_CHAN_DISABLED)) { + if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef)) { sdata_info(sdata, "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", ifibss->bssid, @@ -897,10 +930,11 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, if (err < 0) goto disconnect; if (err) { - params.radar_required = true; + /* IBSS-DFS only allowed with a control program */ + if (!ifibss->userspace_handles_dfs) + goto disconnect; - /* TODO: IBSS-DFS not (yet) supported, disconnect. */ - goto disconnect; + params.radar_required = true; } rcu_read_lock(); @@ -947,12 +981,16 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, ieee80211_bss_info_change_notify(sdata, err); drv_channel_switch_beacon(sdata, ¶ms.chandef); + ieee80211_ibss_csa_mark_radar(sdata); + return true; disconnect: ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); ieee80211_queue_work(&sdata->local->hw, &ifibss->csa_connection_drop_work); + ieee80211_ibss_csa_mark_radar(sdata); + return true; } @@ -1688,6 +1726,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, sdata->u.ibss.privacy = params->privacy; sdata->u.ibss.control_port = params->control_port; + sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; sdata->u.ibss.basic_rates = params->basic_rates; /* fix basic_rates if channel does not support these rates */ diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 8340d49..ff3c31014 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -501,6 +501,7 @@ struct ieee80211_if_ibss { bool privacy; bool control_port; + bool userspace_handles_dfs; u8 bssid[ETH_ALEN] __aligned(2); u8 ssid[IEEE80211_MAX_SSID_LEN]; |
